importproveit# Prepare this notebook for defining the axioms of a theory:%axioms_notebook # Keep this at the top following 'import proveit'.
Defining axioms for theory 'proveit.logic.sets.functions.images'
Subsequent end-of-cell assignments will define axioms
%end_axioms will finalize the definitions
The image of a set under a function is the set obtained by applying the function to each element of that original set.